ata_scsi_change_queue_depth(9) [centos man page]

ATA_SCSI_CHANGE_QUEU(9) 				  libata SCSI translation/emulat				   ATA_SCSI_CHANGE_QUEU(9)

NAME

       ata_scsi_change_queue_depth - SCSI callback for queue depth config

SYNOPSIS

       int ata_scsi_change_queue_depth(struct scsi_device * sdev, int queue_depth, int reason);

ARGUMENTS

       sdev
	   SCSI device to configure queue depth for

       queue_depth
	   new queue depth

       reason
	   calling context

DESCRIPTION

       This is libata standard hostt->change_queue_depth callback. SCSI will call into this callback when user tries to set queue depth via sysfs.

LOCKING

       SCSI layer (we don't care)

RETURNS

       Newly configured queue depth.

AUTHOR

       Jeff Garzik
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						   ATA_SCSI_CHANGE_QUEU(9)

scsi_transport(9F)                                         Kernel Functions for Drivers                                         scsi_transport(9F)

NAME

       scsi_transport - request by a SCSI target driver to start a command

SYNOPSIS

       #include <sys/scsi/scsi.h>

       int scsi_transport(struct scsi_pkt *pkt);

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI).

PARAMETERS

       pkt      Pointer to a scsi_pkt(9S) structure.

DESCRIPTION

       Target  drivers use  scsi_transport() to request the host adapter driver to transport a command to the SCSI target device specified by pkt.
       The target driver must obtain resources for the packet using scsi_init_pkt(9F) prior to calling this function. The packet may  be  initial-
       ized  using  one  of  the  makecom(9F)  functions. scsi_transport() does not wait for the SCSI command to complete. See scsi_poll(9F) for a
       description of polled SCSI commands. Upon completion of the SCSI command the host adapter calls the completion
        routine provided by the target driver in the pkt_comp member of the scsi_pkt pointed to by pkt.

RETURN VALUES

       scsi_transport() returns:

       TRAN_ACCEPT             The packet was accepted by the transport layer.

       TRAN_BUSY               The packet could not be accepted because there was already a packet in  progress  for  this  target/lun,  the  host
                               adapter queue was full, or the target device queue was full.

       TRAN_BADPKT             The DMA count in the packet exceeded the DMA engine's maximum DMA size.

       TRAN_FATAL_ERROR        A fatal error has occurred in the transport layer.

CONTEXT

       scsi_transport() can be called from user or interrupt context.

EXAMPLES

       Example 1: Using scsi_transport()

       if ((status = scsi_transport(rqpkt)) != TRAN_ACCEPT) {
             scsi_log(devp, sd_label, CE_WARN,
                 "transport of request sense pkt fails (0x%x)
", status);
       }

SEE ALSO

       tran_start(9E), makecom(9F), scsi_init_pkt(9F), scsi_pktalloc(9F), scsi_poll(9F), scsi_pkt(9S)

       Writing Device Drivers

SunOS 5.10                                                          30 Aug 1995                                                 scsi_transport(9F)